Why Are My Lights Buzzing?

Lights are not supposed to buzz, and hearing a buzzing sound indicates something, somewhere, needs attention. However, some causes of buzzing noises are very simple, and a few of those simple causes are so simple that you could look at them yourself. That said, you don’t want to mess around with wiring and circuitry, so anything more than changing a bulb should be left to the pros. Regardless of the cause, you shouldn’t ignore buzzing. You might be used to it, but it does indicate that something in the bulb or light fixture isn’t working right. Fixing it now will stop the problem from getting worse.

Fluorescent Ballasts

The connections to a fluorescent bulb can get hot, and that can make the wiring and bulb a little looser. Unfortunately, that looseness allows the bulb to vibrate almost imperceptibly. It’s still enough to give off a buzzing noise.

Sometimes you just have to replace the bulb with a new one that’s of better quality. However, the ballast itself could be going bad. If replacing the bulb doesn’t solve the problem, you should call an electrician.

Age and Quality

Old LED and incandescent/halogen bulbs can buzz, too, if they become so weak that parts of them loosen and start to vibrate. The first step is always to try a new bulb and see if the buzzing continues. If it does, then you know there’s an issue in the fixture or on the circuit.

Loose Wires

The bulb might be fine, but a wire in the fixture itself may have become loose. Have an electrician fix that for you.

Dimmer Switch Vibration

If the light has a dimmer switch, the rapid cycling of the switch can itself set off vibration within the bulb. Try dimming the light a bit. If the vibration gets louder, the dimmer mechanism is the culprit. If the dimmer/fixture is older, it may not work as well with newer, more efficient bulbs. Replacing the dimmer is a good idea in this case.

Rust and Corrosion

If none of these causes seem to fit what’s happening, look inside the socket. Check for rust spots and other signs of corrosion. These function like loose wires, preventing the bulb and fixture from working efficiently. If you see these, have an electrician replace the light fixture (if the fixture is hardwired).

Buzzing is usually simple to diagnose, and a lot of the time, replacing the bulb is all you need to do. Even if it turns out the fixture or wiring is to blame, stopping the buzzing shouldn’t take long. If you live in Tennessee and need lighting repair services, make your first call to Pioneer Heating, Cooling, Plumbing, & Electrical.